Pressure valve



C. OLSON.

PRESSURE VALVE.

APPLICATION HLED IULY 30. 1919- 1,406,216, Patented Feb. 14, 1922.

2 SHEETS-SHEET l.

C. I. OLSON.

PRESSURE VALVE.

APPLICATIGN FILED xuLv 3o. w19.

1,406,216, Patented Feb. 14, 1922.

2 SHEETS-SHEET 2.

zml/o mw, er L A TTUHNEY vmuriera) STATES' PATENT OFFICE.,

cuantas J. omsoN, or musiaeoN, MICHIGAN, AssIeNon To Tim oIsoN'rN-.aunnc saw Nn vALvE comm. or mnmnsroms, INDIANA i rarissima vanvn.

To all whom it may concern:

Be it known that I, CHARLES J. QLsoN, a citizen of the United States, residing at Muske on, county of Muskegon, and bt'ate of Mie igan, have invented certain new and useful Improvements in Pressure Valves, of which the following is a specification.

This inve-ntion relates generally to automatic regulating Valves or iiu1doperated motors.

'Briefly, my device consists of a cylindrical casing having a cylindrical chamber therein, a piston slidable in said chamber and balanced by the pressure of a spring on one side and by the pressure of the fluld on the. other. By a novel arrangement of parts, the fluid and, spring are made to cooperate to regulate the fluid iiow and pressure, as will become apparent 1n thedescription below.

One object of my invention is to provide a Valve or throttle which will automatically govern the adjustment of its inlet so that a rate of fluid iiow proportional to the load on the e'ngine wil always be maintained. i-

Another object is to provide a .valve or throttle which will automatically operate to prevent the pressure in a line from mounting above any desired limit, pre-adjusted by the usual hand-valve.

Another object is to provide a safety valve which may be attached to the supply line near the boiler or compressor, or wherever else desired, so that, in the event of a break anywhere in the line, the 'luid flow will be completely checked automatically by the valve. The advantage of the above is apparent on consideration of the great danger apt to result from the free escape of air, steam or water under pressure. l

These and other objects will become apparent in the following description in association with the drawings Figure 1 is a longitudinal sectional view of the valve, showing the relation of parts when. it is used as a governor for the load on an engine.

Figure 2 is a detail elevation ofthe piston partly broken away and in section.

Figure 3 is a perspective of the adjusting sleeve.

Figure 4 is a perspective of the threaded adjusting ring.

Yan outer cylindrical casing 1 havin Specication of Letters Patent. Patented Feb, 14 1922. Application med July 80, 191.9.` Serial No. 314,277.

' Figure 5 is a cross section of the valve taken through the air vent.

.Figure 6 1s an elevation of the valve of Flgure 1 with the exterior casing shown transparent expose the interior. ShB 1gure 7 1s it similar view to Figure 1 owln a su re atin lu valve embodied gtherewiiiili' gul g p g Figure 8 is a plan view on a reduced scale of the construction shown in Fivure 7.

Flgure 9 is a fragmentary axial section showmg a modified means for adjusting the control spring.

yFigure 10 is a transversesection ori the line 11.-11 o-f Figure 9. l

In the description below, characters of reference refer to similarly marked parts on the drawing.

Referring to Figure 1, the valve comprises 1nturned flanges at its ends providingre uced openings which. are interiorly screw threaded. Inside of the casing 1 is a cylinder 4 of smaller diameter than the interior of the casing 1 so that a compartment 5 is provided. The cylinder 4 has its ends slightly thickened and exteriorly screw threaded als at 2 and 3 to screw into the openings in vthe end of the outer casing 1. The cylinder 4 has ports 6 near one end and ports 7 near the other end of the casing to provide communication between compartment 5 and the interior of said cylinder.V

Within the cylinder 4, near the ports 7, is a head or partition 8 which contains a threaded bore through which the adjusting screw 9 passes. A disk-like block 10 fits piston-like in the cylinder 4, and is cupped to receive the end of' said screw 9. A hollow piston 11 is movable in said cylinder and is separated from said block by a helical spring 12, the end ofthe piston toward the flange 3 being open and the piston being provided with ports 13 in its side. A slidable sleeve 14, shownl in Figure 3, is contained within the threaded end 3 of the the interior threads of the end 3and,.on-

advancement, pushes the sleeve 14, and hence the piston 11 inward against the spring 12, said ring 15 having projectipns. 16 for convenience in turning the ring with the fingers or with a tool. A vent 18 communicates between the cylinder 4 and the exterior of the casing 1; this Vent prevents an accumulation of air under pressure back of the piston which would resist its inward movement the boiler, antiA the flange 3 is connected to the line leading to the engine. The sleeve 14,

which is practically an extension of the ring 15, should be set so that the inner ends of the ports 13' are. slightly spaced inward from the outer ends of the ports 6 thereby establishing {iow through said ports from the compartment 5to the motor line. By experimenting, the ga is widened until the motor, without loa runs at the desired s eed, and the tenslon of the spring 12 siiould be so adjusted that it will just-hold the piston 11 against the sleeve 14 and slightly overbalance the back pressure due to the resistance in the motor. Of course, to adjust the spring, it is necessary'to cut-off the steam supply and disconnect the entire device from the steam line. Under constant load the steam'enters throughthe flanged opening 2'and passes into the compartment 5 through the ports 7. It continues to the end of the compartment- 5 until it is deflected through the ports 6, whence it continues out into the line to the engine. The engine and its load cause a back pressure in the line which operates against the interior of the piston 11 to force the same against the spring 12. New let it be assumed that the load on the engine is increased, forcing the piston 11 inward until the spring 12 is strained sufii cientl to balance the pressure on the piston. Thus the shell of the piston, which acts like a shutter to the ports 6, further opens said ports and permits a larger flow of steam to the engine. Suppose now that 'the load is reduced. Then the back pressure on the piston 11 is correspondingly diminished, and the spring 12 pushes the piston outward, further closing the ports 6 and reducing the rate of flow of steam to the engine'. Thus the valve is automatically operated by the load to vary the supply of steam to the en gine in proportion to the load. To set the device so as to cut-off steam when the load or resistance reaches a predetermined the piston 4 is adjusted so that the lnitial gap through the ports 6 and 13 is defined by the outer ends of the ports 13 and the inner ends of the ports 6 and the tension of the oint,

spring is reduced so that when the resistance approaches the breaking point, the sleeve will be forced past the port 6 by the back pressure and the 'flow of .steam will :be cut-oil'.

-In the embodiment of the invention shown in Figures 7 and 8 a valve casing 20 is screwed onto the projecting end 2 of the cylinder 4. This valve casing 20 carries a turning plug throttle valve 21 provided with the -usual opening 22 and held rotatably in place by the nut 23 in the usual manner.

To provide for adjustmentof the valve a lateral flange is formed on the projecting upper end thereof and is rovided with gear teeth 24 which mesh wit on the end of 'a barrel 26 loosely surroundin the end of the valve casing which is screwe on theo cylinder, 41

In Figures 9 and 10 I have shown a modi- ,l fied means whereby adjustment of the spring 12 may be effected whi In this modification a screw 30 is swiveled e the valve is in place.

in the partition 8 and has fixed thereon a Worm gear 31 meshing with a pinion 32 hav. ing an operating handle 33 projecting exteriorly of the casing 1. A head 34 is threaded on the screw 30 and serves as an abutment for the spring 12. It will be apparent that by rotating the handle 33 the head 34 will be moved longitudinally in the cylinder and so vary the pressure of the piston 11 for any given position of the latter the head being held against rotation by any well known means. j

Having thus described my invention, what I claim as new and desire to secure by Letters Patent. is

1. A governor for fluid-operated engines comprising a casing, a cylinder in said casing spaced therefrom to provide a compartment, ports establishing communication between said cylinder and said compartment, a partition within the cylinder between the ports therein whereby fluid admitted through one end of the cylinder must flow through the compartment to the opposite end of the cylinder, a iston slidable in said cylinder to control t e ports at the lastnamed end of the cylinder and Ioperable by back pressure of the fluid to permit flow to the engine in proportion tothe-load on the engine, and a vent leading from the interior of the cylinder at the rear of the piston through the casing to the exterior of the same. f

2. A governor for a fluid-operated engine comprising a casin a cylinder in said casing spaced from t e walls thereof to prov vide a compartment, portsl establishin communication between said c linder an said compartment, a piston sli able in said c linder to control said ports and operable y back pressure of the fluid to permit ow into said engine in proportion to the load 80 similar teeth 25 A on said en 4ine, a. spring in said cylinder act.-

. ing on sai piston in opposition to the said back pressure, and adjusting means for said iston comprising a rod passing through the iiead of said cylinder and cooperating with the spring to control the movement o'f the `piston 1n one direction, and a sleeve longitudinally movable in said cylinder and limiting the movement of the piston 'in the opposite direction.

3. A governor for a fluid-operated engine comprising` a casing, a-cylind'er in said casing spaced therefrom to provide a compartment, ports establishin communlcation between* said' cylinder an l said compartment,

' a piston slidable in the cylinder to control said ports and operable by back pressure of the fluid to permit ow into the engine in proportion to the load on the en gine, a sprng acting on the plston in oppositlon to the back ressure, and an adjusting sleeve mounted'in the outer vend of the cylinder and acting on the iston in opposition to the spring to initial y set the plston to permit fiow of fiuid.

4. A governor for a Huid-operated engine comprlsmg a casing, a cylinder therein' spaced therefrom to provide a compartment between the cylinder and the casing ports neareach end of the cylinder estab ishing communication between the interior thereof and said.- compartment, a piston in said cylinder controlling the ports near one end thereof and operable under back pressure of the fluid to permit flow to the engine in roportion to the load thereon, a artition 1n the cylinder between the ports t erein, a block in the cylinder between said partition and the piston, a spring disposed between the inner end of the piston and said block, a screw passing through said partition and engaging said block, one end of the casing being internally threaded, and aA slidable sleeve and a threaded ring in said end of the casing atthe outer end of the piston.

5. A device for the purpose set forth comprising a casing, a cylinder in said casing connected at one end withk a source of fluid supply and at its opposite end with a motor and provided with ports near the ends of the casing whereby to establish communication between the interior of the cylinder and the interior of the casin a. partition within the cylinder interm late said ports, a hollow piston slidably mounted in the cylinder between the said partition and -the outlet end of the cylinder and provided with ports ada ted to'register with the ports l1n the c inder near the outlet end thereof, yielda le means acting on the piston to move the same to the outlet end of the cylinder, the outer end of the piston being oln andthe inner end being closed whereby the piston is operated by the back cylinder and exposed to back pressure from the engine, a spring acting co-operatively with said piston to automatically regulate the fluid supply according to the load a movable abutment for said spring, an a member projecting exteriorly of the casing whereby said abutment may be moved.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses, this 29th day of CHARLES J. OLSON.

April, 1919.

l I Witnesses:

EUGENE RIoHnsoN, Farm; YOUNG.

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